using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace PrintingTriangle

{

    public class PrintingTriangle

    {

        public static void Main(string[] args)

        {

            int num = int.Parse(Console.ReadLine());

​

            PrintLine(1, num); 

        }

        private static void PrintLine(int counter, int num)

        {

            counter = 1;

            for (int cow = 1; cow <= num; cow++)

            {

                for (int row = 1; row <= counter; row++)

                {

                    Console.Write(row + " ");

                }

                Console.WriteLine();

                counter++;

            }

            for (int cow = 1; cow <= num; cow++)

            {

                for (int row = 1; row <= counter - 2; row++)

                {

                    Console.Write(row + " ");

                }

                Console.WriteLine();

                counter--;

            }

        }

    }

}